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Cheap flights from Ontario to Missouri from C$ 254

This is the cheapest one-way flight price found by a momondo user in the last 72 hours by searching for a flight from Ontario to Missouri departing on 6/5. Fares may change, and may not be available for all flights or travel dates. Click the price to refresh the search for this deal.
1 adult
1 adult, Economy, 0 bags

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Find the cheapest flights from Ontario to Missouri

Cheap round-trip flights

Enter your travel dates to find the best prices.
United Airlines Logo
6:25 a.m. - 3:46 p.m.
YOW
-
STL
10h 21m
1 stop
United Airlines Logo
6:00 a.m. - 1:59 p.m.
STL
-
YOW
6h 59m
1 stop
C$ 419United Airlines
Mon, 25 May - Fri, 29 May
United Airlines Logo
5:25 p.m. - 10:50 p.m.
YOW
-
STL
6h 25m
1 stop
United Airlines Logo
11:15 a.m. - 11:54 p.m.
STL
-
YOW
11h 39m
2 stops
C$ 423United Airlines
Fri, 1 May - Tue, 5 May
United Airlines Logo
5:25 p.m. - 10:50 p.m.
YOW
-
STL
6h 25m
1 stop
United Airlines Logo
6:30 a.m. - 9:35 p.m.
STL
-
YOW
14h 05m
1 stop
C$ 425United Airlines
Fri, 1 May - Tue, 5 May
Delta Logo
12:25 p.m. - 11:13 p.m.
YOW
-
STL
11h 48m
2 stops
Delta Logo
6:48 a.m. - 5:35 p.m.
STL
-
YOW
9h 47m
2 stops
C$ 519Delta
Fri, 1 May - Tue, 5 May
Delta Logo
12:25 p.m. - 11:13 p.m.
YOW
-
STL
11h 48m
2 stops
Delta Logo
6:48 a.m. - 5:35 p.m.
STL
-
YOW
9h 47m
2 stops
C$ 520Delta
Fri, 1 May - Tue, 5 May
American Airlines Logo
7:20 a.m. - 2:06 p.m.
YYZ
-
STL
7h 46m
1 stop
American Airlines Logo
6:00 a.m. - 2:30 p.m.
STL
-
YYZ
7h 30m
1 stop
C$ 556American Airlines
Wed, 27 May - Wed, 10 Jun
American Airlines Logo
11:39 a.m. - 8:30 p.m.
YYZ
-
STL
9h 51m
1 stop
American Airlines Logo
9:08 a.m. - 5:44 p.m.
STL
-
YYZ
7h 36m
1 stop
C$ 558American Airlines
Wed, 27 May - Wed, 10 Jun
Air Canada Logo
7:30 p.m. - 12:24 p.m.
YOW
-
MCI
17h 54m
2 stops
Air Canada Logo
6:15 a.m. - 9:35 p.m.
MCI
-
YOW
14h 20m
1 stop
C$ 567Air Canada
Mon, 20 Apr - Fri, 24 Apr
Air Canada Logo
7:15 a.m. - 7:45 p.m.
YOW
-
MCI
13h 30m
2 stops
Air Canada Logo
6:15 a.m. - 9:35 p.m.
MCI
-
YOW
14h 20m
1 stop
C$ 629Air Canada
Mon, 20 Apr - Fri, 24 Apr
WestJet Logo
6:50 p.m. - 7:06 p.m.
YUL
-
MCI
25h 16m
1 stop
WestJet Logo
4:10 p.m. - 11:28 p.m.
MCI
-
YUL
6h 18m
1 stop
C$ 818WestJet
Mon, 15 Jun - Sat, 27 Jun

United Airlines flights from Region of Ontario to Missouri

Our best United Airlines deals on Region of Ontario to Missouri flight tickets
United Airlines
25 May
YOW6:25 a.m.Ottawa
10h 21m
1 stop
STL3:46 p.m.Lambert-St Louis
29 May
STL6:00 a.m.Lambert-St Louis
6h 59m
1 stop
YOW1:59 p.m.Ottawa
C$ 419
United Airlines
1 May
YOW5:25 p.m.Ottawa
6h 25m
1 stop
STL10:50 p.m.Lambert-St Louis
5 May
STL11:15 a.m.Lambert-St Louis
11h 39m
2 stops
YOW11:54 p.m.Ottawa
C$ 423
United Airlines
1 May
YOW5:25 p.m.Ottawa
6h 25m
1 stop
STL10:50 p.m.Lambert-St Louis
5 May
STL6:30 a.m.Lambert-St Louis
14h 05m
1 stop
YOW9:35 p.m.Ottawa
C$ 425

American Airlines flights from Region of Ontario to Missouri

Our best American Airlines deals on Region of Ontario to Missouri flight tickets
American Airlines
27 May
YYZ7:20 a.m.Toronto Pearson Intl
7h 46m
1 stop
STL2:06 p.m.Lambert-St Louis
10 Jun
STL6:00 a.m.Lambert-St Louis
7h 30m
1 stop
YYZ2:30 p.m.Toronto Pearson Intl
C$ 556
American Airlines
27 May
YYZ11:39 a.m.Toronto Pearson Intl
9h 51m
1 stop
STL8:30 p.m.Lambert-St Louis
10 Jun
STL9:08 a.m.Lambert-St Louis
7h 36m
1 stop
YYZ5:44 p.m.Toronto Pearson Intl
C$ 558
American Airlines
15 Apr
YYZ7:15 a.m.Toronto Pearson Intl
8h 57m
1 stop
STL3:12 p.m.Lambert-St Louis
21 Apr
STL6:00 a.m.Lambert-St Louis
9h 45m
1 stop
YYZ4:45 p.m.Toronto Pearson Intl
C$ 585

momondo Fare Finder

 
Customize your flight search to find flights from Region of Ontario to Missouri that fit within your specific budget. Explore options based on user searches and filter the results based on your desired price range. Find flights that match your budget for a cost-effective journey. Over the last 7 days, momondo users made 96,600 searches. Data last updated 26 March 2026.
Use the filters below to find and compare flights from Ontario to Missouri that are best for you.

Fly from

Fly to

Route

Depart

Return

Price

Cheapest round-trip

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Mon 25/5

6:25 a.m.-3:46 p.m.

1 stop10h 21m

Lambert-St Louis

Fri 29/5

6:00 a.m.-1:59 p.m.

1 stop6h 59m

C$ 419

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/5

5:25 p.m.-10:50 p.m.

1 stop6h 25m

Lambert-St Louis

Tue 5/5

11:15 a.m.-11:54 p.m.

2 stops11h 39m

C$ 423

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/5

5:25 p.m.-10:50 p.m.

1 stop6h 25m

Lambert-St Louis

Tue 5/5

6:30 a.m.-9:35 p.m.

1 stop14h 05m

C$ 425

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/5

12:25 p.m.-11:13 p.m.

2 stops11h 48m

Lambert-St Louis

Tue 5/5

6:48 a.m.-5:35 p.m.

2 stops9h 47m

C$ 518

OttawaSt. Louis

YOW - STL

YOWSTL

Ottawa

Fri 1/5

12:25 p.m.-11:13 p.m.

2 stops11h 48m

Lambert-St Louis

Tue 5/5

6:48 a.m.-5:35 p.m.

2 stops9h 47m

C$ 520
Quickest round-trip

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 27/5

7:20 a.m.-2:06 p.m.

1 stop7h 46m

Lambert-St Louis

Wed 10/6

6:00 a.m.-2:30 p.m.

1 stop7h 30m

C$ 556

TorontoSt. Louis

YYZ - STL

YYZSTL

Toronto Pearson Intl

Wed 27/5

11:39 a.m.-8:30 p.m.

1 stop9h 51m

Lambert-St Louis

Wed 10/6

9:08 a.m.-5:44 p.m.

1 stop7h 36m

C$ 558

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

Mon 20/4

7:30 p.m.-12:24 p.m.

2 stops17h 54m

Kansas City

Fri 24/4

6:15 a.m.-9:35 p.m.

1 stop14h 20m

C$ 567

OttawaKansas City

YOW - MCI

YOWMCI

Ottawa

Mon 20/4

7:15 a.m.-7:45 p.m.

2 stops13h 30m

Kansas City

Fri 24/4

6:15 a.m.-9:35 p.m.

1 stop14h 20m

C$ 629

MontrealKansas City

YUL - MCI

YULMCI

Montreal Pierre Elliott Trudeau Intl

Mon 15/6

6:50 p.m.-7:06 p.m.

1 stop25h 16m

Kansas City

Sat 27/6

4:10 p.m.-11:28 p.m.

1 stop6h 18m

C$ 818

Flights are sorted by cheapest round-trip flights first.

Showing 1-10 of 20 resultsSorted by cheapest first
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See travel insights to Missouri from

How to get the cheapest flight ticket from Region of Ontario to Missouri

Look no further. We've gone through all the searches for this route on momondo so you have the important information and insights to find the cheapest flight ticket for your trip

What is the cheapest month to fly to Missouri?

The month of June is, on average, the cheapest month to fly to Missouri from Region of Ontario, with most prices found around C$ 495. If you are unable to visit Missouri during the month of June, then departing from Region of Ontario during the month January is also very affordable. Most momondo users find prices during this month for around C$ 545.

What is the cheapest day to depart on your flight to Missouri?

Our data shows that Saturday is the least expensive day to fly to Missouri. Tickets to fly out on this day can be as low as C$ 570. If your travel schedule is flexible, try to avoid departing on a Monday because tickets tend to average around C$ 811. These prices are subject to change though, so be sure to set up a Price Alert for flights to Missouri.

What is the cheapest time of day to depart on your flight to Missouri?

Our data shows that the cheapest Region of Ontario to Missouri flights are usually those with departure times in the morning. Our users have found flights to Missouri in the morning for as low as C$ 542. At noon is when there is more demand to fly to Missouri, so prices are often more expensive at around C$ 623 per ticket.

What is the cheapest Ontario to Missouri flight route?

Fly from Toronto Pearson Intl to Lambert-St Louis for the best Ontario - Missouri flight prices

How far in advance should I book a flight to Missouri?

You are more likely to see cheaper flights to Missouri from Region of Ontario when booking weeks ahead of your departure date. In general, you can expect to find flights to Missouri for around C$ 633 when searching weeks out. However, flight prices might be lower outside of this timeframe. For example, people recently found flights to Missouri from Region of Ontario for as low as C$ 491 on momondo.

What cabin class options are available on Ontario to Missouri flights?

There is only 1 cabin class available to choose from on Ontario to Missouri flights. Cabin price and availability will vary by airline so perform a search above to find the right deals for you.

Can stopping save me money on Region of Ontario to Missouri flights?

You could potentially save up to 29% on your flight if you consider stops on a Region of Ontario to Missouri flight.

Cheap Region of Ontario to Missouri flight deals and tips

Find info about flight duration, direct flights, and airports for your flight from Region of Ontario to Missouri

Best price found

C$ 978

Fastest flight time

2h 06m

Direct flights

Every day

Airports in Missouri

55 airports
The best flight deal from Region of Ontario to Missouri found on momondo in the last 72 hours is C$ 978
The fastest flight from Region of Ontario to Missouri takes 2h 06m
Direct flights go from Region of Ontario to Missouri every day.
There are 55 airports in Missouri. From Region of Ontario there are direct flights to Lambert-St Louis (STL).
Search flight deals

  • When did momondo last update prices for flights from Ontario to Missouri?

    Prices for flights from Ontario to Missouri are refreshed on a daily basis.

  • How many operators does momondo search for flights from Ontario to Missouri?

  • How old do you have to be to fly from Ontario to Missouri?

    The minimum age for a child to fly alone is five, but airlines that offer an unaccompanied minor (UNMR) service may have their own age limitations. Flight duration, scheduling, and layovers are among the considerations that may influence age limits. We recommend that you double-check with the airline you are booking with for travel from Ontario to Missouri.

  • What documentation or ID do you need to fly to Missouri?

    The necessary travel and health documents for your Missouri trip may vary depending on your travel plans and individual circumstances. Generally, you should have various documents, such as a national ID card or driver's license and a passport that is valid for six months beyond your scheduled arrival date. We recommend seeking advice from your airline or a trusted third party, such as IATA.

  • What is the most popular plane model from Region of Ontario to Missouri?

Best airlines flying from Region of Ontario to Missouri

Compare and see reviews for airlines that fly from Region of Ontario to Missouri with momondo
Airline
Rating
Free Cancellation
Price
United AirlinesPriceFrom C$ 332Free CancellationRating
7.4
9,484 reviews
Search United Airlines flights
American AirlinesPriceFrom C$ 364Free CancellationRating
7.1
11,496 reviews
Search American Airlines flights
Air CanadaPriceFrom C$ 458Free CancellationRating
7.1
10,842 reviews
Search Air Canada flights
DeltaPriceFrom C$ 474Free CancellationRating
7.9
8,331 reviews
Search Delta flights
WestJetPriceFrom C$ 556Free CancellationRating
7.2
3,303 reviews
Search WestJet flights

Why use momondo?

Why should I use momondo to find a flight deal from Ontario to Missouri?

To find the flight that best suits your needs, momondo gathers a range of flights from a large pool of different airlines and agents; you can then use our insights and filters to find and book the right flight to Missouri from Ontario.

Can I find flights from Ontario to Missouri with flexible booking policies on momondo?

Yes. momondo allows you to filter the results for Ontario to Missouri flights to just show those with flexible booking policies.

How can momondo help me find flights from Ontario to Missouri?

Once all potential Ontario to Missouri flight options are in front of you, momondo lets you sort and filter flights based on preferences such as airline, price and flight times amongst many other options.

I’m not ready to book a flight from Ontario to Missouri right now. Can momondo alert me if prices change?

Of course. momondo tracks the price of Ontario to Missouri flights. All you need is a valid email address and we will do the rest; it is that quick and easy.

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